substring，

substring，

public String substring(int beginIndex,int endIndex)

Returns a new string that is a substring of this string. The substring begins at the specified beginIndex and extends to the character at index endIndex - 1. Thus the length of the substring is endIndex-beginIndex.

Examples:

"hamburger".substring(4, 8)

returns "urge"

"smiles".substring(1, 5)

returns "mile"

The same as js substring